java - 将文件夹复制到具有相同名称的目标

Question

我正在尝试让备份程序获取用户使用JFileChooser选择的文件夹，并将其复制到也使用相同方法选择的目标。

唯一的问题是，它不会将所选文件夹的所有内容放入目标中命名相同的文件夹中，我真的不知道为什么。我做了一些谷歌搜索，但没有发现任何有用的东西。

代码如下:

package main;

import java.io.File;
import java.util.ArrayList;

public class test {

BackgroundWorker bw;
static ArrayList bgWorker = new ArrayList();
ArrayList al = new ArrayList(); // this is the list of files selected to
                                // back up
String dir = ""; // this is the path to back everything up to selected by
                    static // the user
boolean bwInitiallized = false;

public void startBackup() throws Exception {
    Panel.txtArea.append("Starting Backup...\n");

    for (int i = 0; i < al.size(); i++) {
        /**
         * THIS IS WHERE I NEED TO CREATE THE FOLDER THAT EACH BACKUP FILE
         * WILL GO INTO EX: SC2 GOES INTO A FOLDER CALLED SC2 AND RIOT GOES
         * TO RIOT, ALL WITHIN THE DIRECTORY CHOSEN
         */
        File file = new File((String) al.get(i));
        File directory = new File(dir);

        // File dirFile = new File(dir + "\\" + file.getName());
        // if (!dirFile.exists())
        // dirFile.mkdir();

        bw = new BackgroundWorker(Panel.txtArea, file, directory);
        bgWorker.add(bw);
        bwInitiallized = true;
        bw.execute();

        /**
         * follows to the bottom of the txtarea
         */
        int x;
        Panel.txtArea.selectAll();
        x = Panel.txtArea.getSelectionEnd();
        Panel.txtArea.select(1, x);

    }
    clearList(); // method not included in this example that deletes all the
                    // contents of the al array list.
}

public static void cancel() {
    BackgroundWorker bg;
    if (bwInitiallized) {
        bwInitiallized = false;
        Panel.txtArea.append("Cancelling...\n");
        for (int i = 0; i < bgWorker.size(); i++) {
            // BackgroundWorker bg = (BackgroundWorker) bgWorker.get(i);
            bg = (BackgroundWorker) bgWorker.get(i);
            bg.cancel(true);
        }
        Panel.txtArea.append("Canceled backUp!\n");
    } else {
        Panel.txtArea.append("Cannot Cancel! Not Initiallized!\n");
    }
}
}

我认为问题是:我相信无论出于何种原因，目标文件路径都需要包含包含的文件夹的名称，但我尝试过，但没有帮助。

有人知道我做错了什么吗？

这是生成JFileChooser的代码:

public void fileChooserToDestination() {
    LookAndFeel previousLF = UIManager.getLookAndFeel();
    try {
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    } catch (Exception e) {
    }
    JFileChooser jfc = new JFileChooser();
    try {
        UIManager.setLookAndFeel(previousLF);
    } catch (UnsupportedLookAndFeelException e) {
    }

    jfc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);

    if (jfc.showDialog(null, "Select Directory") == JFileChooser.APPROVE_OPTION) {
        File file = jfc.getSelectedFile();
        dir = file.getPath();
        Panel.txtArea.append("User selected " + file.getPath()
                + " for the destination...\n");
        try {
            startBackup();
        } catch (Exception e) {
        }

    } else {
        Dialogs.msg("You canceled selecting a destination folder! Returning to main screen...");
        al.clear();
        Panel.txtArea.append("User cancelled the destination selection..."
                + "\n");
    }

    return;
}

Answer 1

我需要的部分代码丢失了。我看不到您在哪里决定如何将源文件附加到目标路径，因此我编写了这个快速示例来说明这一点...

File sourcePath = new File("/path/to/be/backed/up");
File destPath = new File("X:/BackupHere");

// Get all the files from sourcePath
List<File> listFiles = getFilesFrom(sourcePath);

for (File toBackup : listFiles) {

    // Now we need to strip off the sourcePath
    // Get the name of the file
    String fileName = toBackup.getName();
    // Get parent folder's path
    String path = toBackup.getParent();
    // Remove the source path from file path
    path = path.substring(sourcePath.getPath().length());

    // Append the file name to the path
    path = path + File.separator + fileName;

    // Now we have the name of the back up file
    String backupFile = destPath + path;

    System.out.println("Backup to " + backupFile);

}

基本上，您需要删除“源路径”(您要复制的目录)。然后，您可以使用结果值附加到“备份路径”值，然后您应该有一个合适的路径。